speed mode

I've had a click when I stand and climb hills for about a week now. Turns out my factory TREK 1.5 wheels are so weak that the rim flexes over 1/4inch and makes the sensor touch the pick up. @ 3/8's it won't do it. Should probly tighten and true the rim. What can be expected of a nice set of carbon wheels in the $1200-$1700 range?

Trucker Dan

Carbon wheels tend to be more flexy than aluminum.

speed mode

WHAT? I thought they were stiff and gave good support to really push off of to climb the mountains!

HMF

move the sensor closer to the axis of rotation (the axle). there will be less lateral movement there.

or buy new wheels

crhilton

I have a set of bontcrapper wheels too and had a similar problem. I switched groups and found that my spokes rubbed on the rear der if I stood on it in the lowest gear. The spokes were flexing that much (the old der must have sat a little farther away). If you hit a bump you could get it sitting down.

Took it to the shop and talked it over with them, they said the rear wheel had insanely low tension and he added 3/4 of a turn. Since then I only get a slight rubbing in the lowest gear if I really stand on it hard.

I would take it to a guy who knows wheels to see if it's a problem with the wheel. I'd been riding that wheel for almost 3 years and many thousands of miles. After he added tension the bike felt a little better, honestly, but the difference was tiny. The main difference was that I could use my granny cog again!